Chuck



Dec 24, 1929. A. CURRIER CHUCK Original Filed Oct. 8, 1926 ai iorn egPatented Dec. 24, 19259 UNITED STATES PATENT OFFICE CHUCK Originalapplication filed October 8, 1926, Serial No. 140,371. Divided and thisapplication filed October My present invention is a novel and improvedchuck, devised primarily for use as a saw holding chuck in button blankcutting machines, and is a division of my prior and co-pendingapplication, Serial No. 140,371

filed October 8, 1926.

An important feature of my present invention is the provision of a chuckto hold a saw or other cutting or holding instrumentality, which chuckwill be substantially automatic in its release, as well as in theholding and engaging actions. With the provision of such a chuck, theremoval and replacements of the cutting saws or other de vices held bythe chuck, is greatly facilitated, thereby increasing the efiiciency ofthe particular machine in which the chuck is to be utilized.

I believe that such an automatic chuck is novel, and I have thereforeclaimed the same herein broadly.

The chuck illustrated herein is particularly adapted for use in buttonblank cutting machines, wherein the steps of operation are quick, andfollow each other in rapid succession, thus requiring a chuck which willbe positive inaction, sturdy and compact in construction and capable offacilitating removal and replacement of the cutting devices carriedthereby.

The form of chuck illustrated in the present application firmly,securely, and rigidly holds the chuck spool in position, againstvertical or lateral movement, andhas aminimum number of moving parts,thus greatly reducing wear. The spool of the chuck, which carries thecutting instrumentalities, While thus firmly and securely held inposition, is nevertheless automatically and instantly removed from thespindle by extremely simple mechanism.

In the chuck shown herein the spool may be applied to the spindle whilethe spindle is rotating, and the spool will automatically find its ownseat in the spindle. This ability Serial No. 140,770.

to insert the spool in the spindle While the chuck spindle is rotating,is a very important step, and one which adds greatly to the efficiencyof the machine.

I also provide novel means for alining the spool in the proper positionin relation with the chuck spindle, which means will also insurepositive rotation of the spool with the chuck spindle, at the same timepreventing slippage or looseness of the spool within the spindle.

Further features of the invention, novel combinations of parts andadvantages, will be hereinafter more fully pointed out and claimed.

Referring to the drawings illustrating preferred embodiments of myinvention,

Fig. 1 is a front elevation, partly in cross section, of my novel chuck;

Fig. 2 is a cross sectional view on the line 22 of Fig. 1;

Fig. 3 is a front sectional elevation showing the spool. holding meansin disengaged position; and

Fig. 4 is a fragmentary detail illustrating the spool alining means.

Referring noW to Figs. 1 to 4, illustrating a prefered form of my chuck,the same comprises a spindle 1 having its inner edge bevelled as shownat 2, to receive the spool 3 having a bevelled or slanting face 4;. Thespool 3 is formed hollow, a illustrated at 5, to receive internallyarranged work holding devices 6, the function of which work holdingdevices is more clearly set forth in my said copending applicationSerial No. 140,371. At opposite points are provided openings 7, toreceive the spool holding and locking balls 8. Fitted around the spindle1 is a ring 9 having an internal annular grooved or recessed portion 10,and an outer groove 11 adapted to receive the bottom portion of a coiledspring 12. The recess 10 is of sufiicient extent so that, when relativemovement is effected between the ring 9 and the spindle 1,

each ball 8 may be forced within the recess and permit the bevelled face4 of the spool 3 to be released from locking engagement with theballs'8. The spool 3 is also provided with an annular groove or recess13 in which a portion of the locking balls 8 fit or slide when the ring8 and spindle 1 are in the-position shown in Fig. 1, viz., when thespool 3 is locked to the spindle 1. The upper edge of the annular groove13 is bevelled as illustrated at 14,.to.provide freerrolling or. sliding,of "the balls 8. Upon release of the balls 8 from engagement with thegroove 13, the spool 3 will automatically drop, of "its 5 own weight,freeof thespindlel, as willbe further explained. Secured to the lower.portion of the spindle 1 is a ring member 15," having ayrecess 16 toreceivethe opposite-pen tion of the coiled spring 12, said ring being 20locked to the spindle 1 by one or more pins 1'1 Iaalso preferablyprovidea driving pin CIT-:Sttld 18, securedto the spool 3 and slidingima; slot or;recess.19 in the lower portion of the rim or edge of thespindle 1.

I provide. a pluralityof adjustable-..stops 20,20, adapted to beheld inany desired adjusted position inalignment with thering. 9., Thereupon,on actuationof the spindle .1

. in.. vertical-direction, the ring, 9'will be brought into engagementwith the endsof the stops 20, which will depress said. ring.

9 against-the-tension of the. spring 12,.bringing ,the recess-10intoalignment with the locking balls 8, into which recess .10 the balls.

.8 will move, thus moving out of the groove l3-invthe spool 3 andreleasing said spooland permitting the-same to be instantly removed.Thespool-3 has a depending'shank 21, which receives the tubularsaw orother-cutting or-1 workinginstrumentality22.. These saws are preferablyof split spring metal which are driven intothe. slightly beveled innerwalls of .the. .shank21 and spool 3,-sovthat, at .the saw cutting edge,the same will bea continue ,,ousaline... The-friction fitrthus alfordedby the use of the split springmetal saws or other cutting device-isamply sufiicient to hold the same firmly in position, while at the sametime...-permitting the saws to be easi-ly and ,quickly-removed, bysimply driving out in the/opposite direction, and replacinga new: one. AThis hollowarrangement of a spool 3 andshank21 alsopermits of my novelwork holding devices 6, .6, which are .arranged 1 to ,;pprojectinadvance of the cutting, edge ofthe saw 22, and may be of any suitablesize, shape, and material, for the particular purpose intended.

With'the spool 3 removed from the spindle eoq.1,.fo'r any purpose, such.as replacing of the saw orother:cuttingtdevice, the spring 12'is stillheld-under tension, as illustrated in Fig...2,,theiringfilbeing.depressed and the balls 8-resting; in the recesses10 and .7. There- :;upon,--.when-. desired to reinsert the spool-3spindle 1.

I. believe .thatmy chuck,...,as vabove described, is is novel} and I?have therefore claimed the same herein broadly.

An impprtant advantage of the present form of chuckisthe fact-that theentire operation of removing the chuck spool and replacing the same maybe performed without stopping-the. aetionaorlrotatione ofnthexspindletlthus greatly expediting such replacement of the chuck spool andincreasing the efficiency of the machine:

It .will -beappreciated that. while I Zh'ave illustrated mynovel chuckherein constructed: and: arranged for .usein a button blankcuttingmachine of the type illustrated: in my priorv and copendingapplicationglam not limited thereto, butmy novel chuck-may berutilizedin any 1 form. of machine. wherein quickly at.-

' tached, automatically removable.-.-and :posi.-.: tively actingchucksof this: type (are desired:

It wil-lalso bezappreciateda-that Imayvary the size, shape-,-..-andarrangement:ofparts,-= within ;.-reas.onably .wideslimitg; without;departingfrom thespirit.'ofthe invention-a My invention-is; further;defined and .:described in the form; of iclaims;, as.; follows 1; i

1. A chuck; comprising. a .rotating; spindle having recesses therein,holding and locking; balls. in said recesses, a. tapered .tool. holdingspoolhavingian annular; groove in the. tapered surface thereof a stud onsaid .spooli'adapted to align with a; slot: in said spindle to; drivesaid spool :with said-spindle, a spring;;sur-.-- rounding-said spindle,arerelativel-y movablev ring. around isaidispindle having groove itherein EOjELCOOIIlIIlOdfiIB vone. aportioniof said i. spring, and asecond ring;aflixed:.to said-spineldle and having a groove to.-,accommod-ate the; other endsof said springgsaid movable ring; having agroove on its inner side normally dis-=- posed above said-balls; said.movable .ringzb'eingcdepressible; to bring saidiinner; groovein the.movableringrinto alignment withithe-ball; lIOIdlHgQI'GCGSSQS .to permitidisengagementof 1 said balls .from. they annular, groove in said spooland to permit releasepf said ls poolzfrom': said spindle.

2., A:chuck-,;comprising ;a;-rotating.=;-spindle; having recessestherein; holding rand locking. balls in saidrecessesyartapered.:toolholdings spool having an annular-:groove-inzzthetape ered zsurfacethereof avspringisurrounding 831d: sp1ndle, a-. .relat-iv ely= movable:ring; around said sp ndle hav1ng. .;a:--gr,oove there-;

in to accommodate. one portiomofsaid.spring,v

